<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="http://localhost:3000/mycss.css?sleep=1">
</head>
<body>
    <h1>Hello</h1>
    <h1 style="color: #000">World</h1>
    <script src="http://localhost:3000/myscript.js?sleep=3"></script>
</body>
</html>